JPH10314479A - Device for supplying belt loop piece for sawing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate threading needle work when thread is cut during sawing by cutting a belt so as to make a belt loop piece, holding it in grasp parts, folding its both end parts so as to send them to a sawing position and constituting the grasp parts so as to be saving possible at the time of interrupting sawing. SOLUTION: A pair of grasp parts 47 of a folding transfer mechanism 40 is moved to a saving position at the time of operating a belt loop piece supply device 1 at first and, then, a press plate 32 is moved to an upper limit position by the first airing 26 of a holding mechanism 20. Then, the belt is supplied to a belt supply mechanism and held by a press 36 and a press plate 32 by the extension movement of a second air cylinder 33 so that the belt loop piece is obtained by cutting the belt by a cutter in this state. The belt loop piece is lowered in a holding state, grasped by the grasp parts 47, folded so as to be symmetric in the both end parts of it by the operation of a rotary cylinder 45 and moved to the sawing position of a two-needle sawing machine 2 in this state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt loop piece feeder for a sewing machine which feeds a belt loop piece having both ends bent to the sewing position from the side of a two-needle sewing machine. The present invention relates to a device that improves the workability of a threading operation by retracting a grip portion that holds a belt loop piece when threading a thread.

[0002]

2. Description of the Related Art A two-needle sewing machine for sewing a belt loop piece to form a belt loop for passing a belt through a body cloth such as trousers is provided with a belt loop piece having both ends bent at the side of the two-needle sewing machine. And a belt loop piece supply device for supplying the belt loop to the sewing position. As this belt loop piece supply device, recently, a belt sent by a roller or the like is cut into a predetermined length suitable for a belt loop, and a pair of forks (gripping portions) is used to hold the vicinity of both ends, By rotating these fork portions symmetrically by about 360 degrees, the fork portions holding the bent belt loop pieces are made to stand by at a side standby position close to the two-needle sewing machine. When the supply switch for transferring the belt loop piece to the two-needle sewing machine is operated when the sewing machine can be sewn with the two-needle sewing machine, the fork is moved from the standby position to the sewing position, and both ends are moved. A configuration in which a bent belt loop piece is supplied to a two-needle sewing machine is being applied.

[0003] In this case, in the two-needle sewing machine, bar-tacking is performed by the sewing needle in a state in which the upper retainer is lowered to press and hold the body cloth and the belt loop piece. Here, as this kind of belt loop piece supply device, in order to improve the efficiency of sewing work, after transferring the belt loop piece to the two-needle sewing machine, the two-needle sewing machine attaches the belt loop piece to both ends of the belt loop piece. During the execution of bar-tacking, the fork is retracted from the sewing position to the predetermined retracted position on the side of the two-needle sewing machine, and the fork is held with the next belt loop piece whose both ends are bent. To wait at the standby position.

[0004] By the way, during execution of bar-tacking sewing with a two-needle sewing machine, there is a case where the upper thread breaks. In this case, the sewing is automatically interrupted and the upper presser is automatically raised. Therefore, the operator who noticed the breakage of the thread operates the holding down switch to lower the upper presser, and at the same time, for example, in a narrow space of about 10 cm between the fork portion and the sewing needle located at the standby position, The cut upper thread is passed through the eye of the sewing needle.

[0005]

In the conventional belt loop piece feeding device, every time the belt loop piece is transferred to the two-needle sewing machine, the fork portion is prepared to prepare the belt loop piece for the next sewing. It is controlled to move to the standby position after returning to the retreat position. However, the movement of the fork is not controlled when an abnormality such as a needle thread break occurs on the two-needle sewing machine side. Since the threading operation is performed manually in a narrow space, there is a problem that the workability of the threading operation is lacking, the threading operation is troublesome, and the sewing operation efficiency is reduced. An object of the present invention is to provide a belt loop piece feeder for a sewing machine that can easily and efficiently thread a sewing machine through a sewing needle when a thread breaks during sewing.

[0006]

According to a first aspect of the present invention, there is provided a belt loop piece feeder for a sewing machine for sewing a belt loop piece to a body.
In a belt loop piece supply device that supplies a belt loop piece having both end portions bent to a sewing position from a side of the sewing machine, a material supply unit that supplies and cuts a belt to form a belt loop piece, and is supplied by the material supply unit. Holding means for holding the belt loop piece, a bending means for receiving the belt loop piece held by the holding means, bending both end portions thereof and moving it to a sewing position, and when sewing is interrupted,
Interruption control means for retracting the belt loop piece gripping portion of the folding means to a predetermined interruption evacuation position disengaged to the side of the bed portion when the upper press of the cloth press means retreats to the lowered retreat position. is there.

The material supply means supplies the belt and cuts the belt at a position of a designated length from the free end side of the belt to form a belt loop piece. The holding means holds the belt loop piece supplied from the material supply means, and the bending means receives the belt loop piece held by the holding means, and bends both ends thereof to move to the sewing position. By the way, when the sewing machine stops sewing, when the upper presser of the cloth presser retreats to the lowering and retreating position, the predetermined suspending retreat position in which the belt loop piece gripping portion of the folding means is disengaged to the side of the bed portion. Evacuate to Thereby, a sufficient space is provided between the sewing needle of the sewing machine and the belt loop piece supply device, and the upper retainer is retracted to the lowered position, so that threading of the sewing machine with the sewing needle can be easily performed.

According to a second aspect of the present invention, in the first aspect of the present invention, the folding means includes a retracting position in which the belt loop piece gripping part is retracted to the side of the sewing machine to the maximum. It is characterized in that the folded belt loop piece is held and moved on the upper surface of the bed portion between a standby position deviating from the sewing position and a sewing position.

In this case, the folding means first moves the pair of gripping parts to the retracted position which is retracted to the side of the sewing machine as much as possible, and when the holding means holds the belt loop piece at a predetermined position, The belt loop piece is held by a pair of gripping portions, and both ends are bent and moved to a standby position to be on standby. Then, a pair of gripping portions are moved to a sewing position and handed over to a sewing machine. Is returned to the retracted position. This is one cycle of one belt loop piece supply. In addition, the same operation as the first aspect is achieved.

According to a third aspect of the present invention, in the second aspect of the present invention, the interrupt control means includes a belt loop piece gripping part located at a retreat position for interruption.
When the upper presser returns from the lowering / retracting position upward,
The belt loop piece gripping portion is returned to the original position immediately before the interruption of sewing. In this case, when the belt loop piece gripping part is at the retreat position for interruption and the upper retainer returns upward from the lowering retreat position, the interruption control means moves the belt loop piece gripping part to the original position immediately before the sewing interruption. Return to In addition, the same operation as the second aspect is achieved.

According to a fourth aspect of the present invention, there is provided a belt loop piece supply device for a sewing machine for sewing a belt loop piece around a body, wherein the belt loop piece having both end portions bent is attached to a side of the sewing machine. In a belt loop piece supply device for supplying a belt loop piece from the material supply means to a belt loop piece, a holding means for holding the belt loop piece supplied by the material supply means, Folding means for receiving the belt loop piece held by the means and bending both end portions thereof to move to the sewing position; and, when sewing is interrupted due to breakage of the upper thread, the belt loop piece gripping portion of the folding means comes off to the side of the bed. Interruption control means for retreating to a predetermined interruption retreat position.

The operation is substantially the same as that of the first aspect, but differs in the following point. That is, when the sewing is interrupted due to the breakage of the upper thread, the interruption control means retracts the belt loop piece gripping portion of the folding means to a predetermined interruption retreat position off the side of the bed. With this, when threading the sewing machine through the sewing needle,
The operation of retracting the belt loop piece gripping portion can be omitted, and the operability of the threading operation is improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 to FIG. 4, the belt loop piece supply device 1 for a two-needle sewing machine is a
Is supplied to the sewing position of the two-needle sewing machine 2 from the side of the two-needle sewing machine 2 to which the belt loop piece 57 is supplied. The belt loop through which the belt passes is sewn to the body fabric such as trousers.

Since the two-needle sewing machine 2 is constructed in the same manner as a normal sewing machine, it will be briefly described that the needle bar 3 is driven up and down via a main shaft driven by a sewing machine motor (not shown). The two sewing needles 4 attached to the lower end of the needle bar 3 are driven up and down. A lower press 9 is disposed near the upper surface of a needle plate (not shown) provided in the bed portion, and the upper press 5 opposed to the lower press 9 is a press drive mechanism 6.
As a result, it is lowered at the start of sewing and raised at the end of sewing. At the time of sewing, the upper and lower pressers 5 and 9 are moved and driven based on the bar-tacking stitch data by a presser moving mechanism (not shown) in a state where the body cloth of the pants and the belt loop piece 57 are pressed and sandwiched.

At the end of sewing, the thread end of the upper thread extending from the eye of the sewing needle 4 is removed by a thread remover 8 driven by an air cylinder 7. Here, these upper and lower pressers 5,
The cloth holding means is constituted by the press holding mechanism 9, the pressing drive mechanism 6 and the pressing moving mechanism. The upper presser 5 is lowered by operating a press down switch 65c provided on the operation panel 65 (see FIG. 6), and the presser up switch 65d.
It rises by operation.

The belt loop piece supply device 1 is mounted on a table 55 adjacent to the two-needle sewing machine 2 and basically supplies a belt and cuts it into a belt loop piece 57 by a material supply mechanism 10; A holding mechanism 20 for holding the belt loop piece 57 supplied by the material supply mechanism 10, a bending transfer mechanism 40 for receiving the belt loop piece 57 held by the holding mechanism 20, bending the both end portions thereof, and supplying the bent end to the sewing position; Automatically transfers the belt loop piece 57 having a poor bending based on a predetermined command.
And a belt loop piece removing mechanism 50 that removes it from zero.

As shown in FIG. 4, the material supply mechanism 10 feeds and drives a belt accommodating portion (not shown) accommodating a long belt 56 having a continuous seam and a belt 56 extending from the belt accommodating portion. Supply roller 11 and receiving plate 1
2, a seam detection sensor 13 for detecting a seam of the belt 56, and a cutter 14 for cutting the belt 56 (the fixed blade 1).
4a, a movable blade 14b, and an actuator 14c for driving the movable blade 14b). The control unit 60 controls the rotation amount of a servo motor 66 that drives the supply roller 11 to rotate, so that the belt 56 is fed by a set length and then cut by the cutter 14 (FIG. 9). 6).

The holding mechanism 20 will be described. FIG.
As shown in FIG. 4 to FIG. 4, a vertical mounting plate 22 is fixed to the fixing member 21 erected on the table 55, and the mounting plate 22 is provided with a pair of holding units 23A and 23B. With respect to one holding unit 23A, a thin and long vertical base plate 24 is fixed to a mounting plate 22 through a long hole 25 so as to be position-adjustable in the horizontal direction.
A first air cylinder 26 is fixed to an upper end of the first air cylinder 26 in an inverted manner with an L-shaped bracket 27, and a block 28 is fixed to a lower end of a piston rod 26a of the first air cylinder 26. The block 29 is engaged with a guide 22a fixed to the base plate 24 and is guided so as to be able to move up and down.
4 is fixed.

The piston rod 2 of the first air cylinder 26
A stopper 30 that is vertically adjustable and that determines the upper limit position of the block body 28 is fixed to 6a. A crank-shaped bracket 31 is fixed to the lower surface of the block body 28, and a holding plate 32 for pressing the lower surface of the belt loop piece 57 is integrally formed at the lower end of the crank-shaped bracket 31. On the other hand, a second air cylinder 33 is fixed to the block body 28 in an inverted manner via an L-shaped bracket 34, and a holding block 35 is fixed to a lower end portion of the piston rod 33a of the second air cylinder 33,
The holding block 35 includes a holding member 36 for holding the belt loop piece 57 on the holding plate 32, and a belt loop piece 57.
And a guide portion 37 for guiding the end portion of the frame are fixed.

The piston rod 33a of the second air cylinder 33 is configured not to rotate. A locking rod 39 that locks the central portion of the belt loop piece 57 in a state in which the belt loop piece 57 is swelled upward is fixed to the mounting plate 22 via a long hole 38 of the mounting plate 22 so as to be freely adjustable in the horizontal direction. . The other holding unit 23B is disposed in parallel with the one holding unit 23A with an interval between the other holding unit 23B and the other holding unit 23B.
Since the configuration is basically the same as that of A, the same reference numerals are given to the same members, and the description will be omitted.

However, the base plate 24 of the holding unit 23B is fixed to the mounting plate 22. Then, the base plate 24 of one holding unit 23A is fixed so as to be position-adjustable through the long hole 25 of the mounting plate 22 so that the belt loop pieces 57 of various lengths can be pressed,
By adjusting the position of one holding unit 23A, the distance between the two holding units 23A and 23B can be adjusted.
The pair of first air cylinders 26, 26 and the pair of second air cylinders 33, 33 are controlled by a control unit 60.

The folding transfer mechanism 40 will be described. As shown in FIG. 1 to FIG.
No. 0 has a pair of bending transfer units 41A and 41B arranged in a horizontal direction substantially perpendicular to the side surface of the two-needle sewing machine 2 at positions corresponding to both sides of the holding plate 32 located at the lower limit position. . One holding unit 23
A, one folding transfer unit 41A will be described.
Is an air cylinder 44 fixed to the table 55 by the mounting bracket 43, and a rotating air cylinder 45 fixed to the tip of a piston rod 44a of the air cylinder 44.
And a rod 46 fixed to the output shaft of the air cylinder 45 for rotation, and two rods provided at the distal end of the rod 46.
It has a fork-shaped belt loop piece gripping portion (hereinafter simply referred to as a gripping portion) 47 composed of a number of parallel pins, and four position detection sensors 42a to 42d. The piston rod 44a of the air cylinder 44 is configured not to rotate with respect to the cylinder body, and the four position detection sensors 42a to 42d are mounted on a mounting bracket 43 so as to be adjustable in the horizontal direction. 42.

The air cylinder 44 has a gripper 47,
A retracted position (see FIGS. 1 and 14) in which the presser plate 32 is fully retracted to the side opposite to the two-needle sewing machine 2, and a bending position where the belt loop piece 57 is bent (see FIGS. 15 to 17).
), A standby position (see FIGS. 2 and 18) between the bending position and the sewing position, and a sewing position (shown by a chain line in FIG. 2). .
The retracted position, the bending position, the standby position, the sewing position,
The position is detected by each of the four position detection sensors 42a to 42d.

The other bending and transferring unit 41B corresponding to the other holding unit 23B has basically the same structure as the one bending and transferring unit 41A. However, the air cylinder 44 of the other bending / transfer unit 41B is fixedly provided on the table 55, but the air cylinder 44 of the one bending / transfer unit 41A is used to adjust the interval between the bending units 41A and 41B. Is fixed to the mounting bracket 43 so that the position can be adjusted in the horizontal direction.
When the position of one folding transfer unit 41A is adjusted, the position of the mounting plate 42 is adjusted so as to correspond to the folding transfer unit 41A. The detection signals of the four position detection sensors 42a to 42d are supplied to a control unit 60, and the air cylinders 44, 44 and the rotation air cylinders 45, 45 are controlled by the control unit 60.

The belt loop piece removing mechanism 50 will be described. As shown in FIGS. 1 to 5, the belt loop piece removing mechanism 50 includes a pair of locking members 51 fixed to the pair of crank-shaped brackets 31 and extending vertically downward by a predetermined length. The loop piece removing mechanism 50 does not always include only the pair of locking members 51, but the folding transfer mechanism 40 and the control unit 60 also constitute a part of the belt loop piece removing mechanism 50.

The bending / transporting mechanism 40 bends both end portions of the belt loop piece 57 to form the belt loop piece 57.
In the standby position, the two-needle sewing machine 2
When the operator operates the removal command switch 65b (see FIG. 6), the pair of air cylinders 44 of the folding and transporting mechanism 40 are driven into and out, and the pair of grippers 47 grip the belt loop piece 57. While moving from the standby position to the evacuation position, the belt loop piece 57 is locked by the pair of locking members 51 and removed from the pair of gripping portions 47.

Next, a control system of the belt loop piece supply device 1 will be described. As shown in FIG.
0 controls the belt loop piece supply device 1,
Although a control system for the two-needle sewing machine 2 is not shown, the CPU 61 of the control unit 60 is connected to the control unit 70 of the two-needle sewing machine 2 via a bus such as a data bus. The control unit 60 includes a CPU 61 and a ROM 6
2, a RAM 63, an input / output interface 64,
It is composed of a plurality of drive circuits and the like.

A control program for controlling the belt loop piece supply device 1 is previously stored in the ROM 62. The input / output interface 64 includes an operation panel 65 having various switches such as a supply command switch 65a, a removal command switch 65b, a press down switch 56c and a press up switch 65d, position detecting sensors 42a to 42d, A signal from the detection sensor 13 is input.

The air cylinders 26, 26, 33, 33, 4
Solenoids (SOL) 26a, 26a, 33a, 33 of solenoid valves of air supply systems of 4, 44, 45, 45
a, 44a, 44a, 45a, and 45a, respectively, are driven.
In addition to the two drive circuits, a drive circuit for the servo motor 66 for driving the supply roller 11 and a drive circuit for driving the cutter actuator 14c are also provided in the control unit 60.

Next, a belt loop piece supply control routine executed by the control unit 60 of the above-described belt loop piece supply device 1 will be described with reference to the flowchart of FIG. However, the reference symbol Si (i = 10, 1
1, 12...) Are each step. When the power is supplied to the belt loop piece supply device 1, first, as shown in FIGS.
Is moved to the retracted position (S10), and the pair of first air cylinders 26 move and hold the pair of holding plates 32 to the upper limit position, and the pair of second air cylinders 33 move the one pressing plate 32 to the upper limit position. Initialization processing such as moving and holding the pair of holding blocks 35 to the upper limit position is executed (S
11).

Next, a belt loop piece holding process is executed (S12). That is, in this process, first, the belt 56 is supplied by the belt supply mechanism 10, and FIG.
As shown in FIG. 3, the piston rods 33a of the pair of second air cylinders 33 extend, and the pair of pressers 36 and the guide portions 37 descend to cooperate with the pair of press plates 32 to move the belt 56. Hold. In this manner, the belt 56 is cut by the cutter 14 while holding the vicinity of both ends of the belt 56 to form a belt loop piece 57, and the belt loop piece 5
7 is held.

Next, a bending process is performed (S1).
3). That is, in this process, as shown in FIGS. 10 and 14, the piston rods 26a and 33a of the pair of first and second air cylinders 26 and 33 extend, and the pair of pressing plates 32 and The presser 36 and a pair of guide portions 37 are lowered to the lower limit position while holding the belt loop piece 57. At this time, the central portion of the belt loop piece 57 is locked by the locking rod 38. Next, FIGS. 10 and 15
As shown in FIG. 1, the pair of air cylinders 44 is driven to
The pair of grip portions 47 advance to the bending position, and each grip portion 47 is in a state of gripping a portion near the end of the belt loop piece 57.

Next, as shown in FIGS. 11 and 16, a pair of rotating air cylinders 45 are driven to rotate in the bending direction, and both ends of the belt loop piece 57 are symmetrical by the pair of gripping portions 47. Bendable. Next, a process of moving the gripper 47 to the standby position is performed (S14). That is, in this movement processing, first, as shown in FIGS.
The piston rods 33a of the pair of second air cylinders 33 are driven to retreat, and the pair of pressers 36 and the guide portions 37 move up. Then, as shown in FIGS. Is driven to bend the belt loop piece 5
The pair of gripping portions 47 holding 7 advance to the standby position and wait.

Next, the belt loop piece 5 is
When the supply of the belt loop piece 57 is commanded by the operator operating the supply command switch 65a in order to sew the belt 7 (S15: Yes), the belt loop held by the pair of grips 47 is sewn. A delivery process of delivering the piece 57 to the two-needle sewing machine 2 is executed (S19). That is, in this delivery process, the pair of gripping portions 47 are driven by the pair of air cylinders 44 so that the pair of gripping portions 47 are chained in FIG. When the belt is advanced to the sewing position indicated by, the belt loop piece 57 held by the grip portion 47 is transferred to the upper side of the lower presser 9.

At this time, the control unit 7 of the two-needle sewing machine 2 receiving the movement signal to the sewing position from the control unit 60
0, the upper retainer 5 is lowered, and the belt loop piece 57 is pressed and held by the upper retainer 5 and the lower retainer 9, and the control unit 60 receiving the pressing completion signal causes the piston rods 44a of the pair of air cylinders 44 to move. The retracting drive is performed, and the pair of grip portions 47 return to the retracted position. Next, the start of sewing processing is instructed to the control unit 70 (S20), and S10 is started.
Steps S14 to S14 are executed. As a result, in the two-needle sewing machine 2,
The sewing is performed in which the sewing needle 4 is driven to sew the belt loop piece 57 to a predetermined portion of the body cloth.

During the sewing of the belt loop piece 57 by the two-needle sewing machine 2, the pair of gripping portions 47 are bent from the retracted position in the belt loop piece supply device 1 as described above. The belt loop piece 57 is gripped in a state where both ends of the belt loop piece 57 are symmetrically bent, and further advances to the standby position and waits in the gripped state.
That is, when the pair of grippers 47 are at the standby position (shown by a solid line in FIG. 2) while holding the belt loop piece 57 in a bent state, the position of the sewing needle 4 and the tip end of the gripper 47 are different. The distance G is, for example, about 10 cm.

When the upper thread breaks during sewing of the belt loop piece 57 to the body cloth, sewing by the two-needle sewing machine 2 is interrupted, and at the same time, the upper presser 5 rises to the upper position. Here, the operator sets the sewing needle 4
When the hold down switch 65c is operated by noticing that the upper thread is cut (S15: No, S16: Yes),
The control unit 70 is instructed to lower the upper presser (S21), and is driven to move the pair of grippers 47 to the retracted position (S22). Thereby, as shown in FIG. 19, the upper presser 5 is lowered to the pressing position at the time of sewing, that is, the lowering and retreating position.
Is driven toward the retreat position, and the pair of grippers 47 retreat to the retreat position (this corresponds to the retreat position for interruption).

Here, while the grip portion 47 is moving to the retracted position, the belt loop piece 57 is locked by the pair of locking members 51 and is removed from the pair of grip portions 47. That is, as shown in FIG. 19, the gripper 47 is retracted from the standby position to the retracted position which is retracted to the side of the two-needle sewing machine 2 as much as possible.
And a space Ge sufficient for the threading operation is provided, and the upper presser 5 is moved below the eye of the sewing needle 4, so that the threading operation for the sewing needle 4 can be performed easily and efficiently. And the threading workability is improved.

Next, when the press-up switch 65d is operated at the start of sewing due to the completion of the threading (S23: Yes), the control unit 70 is instructed to raise the upper press (S24). According to steps S11 and S14, the pair of grippers 47 advance to the standby position and wait while holding both ends of the belt loop piece 57 symmetrically bent. That is, the pair of gripping portions 47 have returned to the original standby positions immediately before the interruption of sewing. Thereafter, the supply switch 65a is operated, and bar-tacking is executed as described above. Here, S22 to S24, S10 to S14, etc., constitute the interruption control means.

On the other hand, when the pair of gripping portions 47 holding the bent belt loop piece 57 are at the standby position, the operator cannot see the belt loop piece 57 and is not suitable for sewing due to poor bending or the like. If it is determined that the removal command switch 65b has been operated (S15 / S16: No, S
17: Yes), as shown in FIG. 18, the pair of turning air cylinders 45 is driven to turn in a direction to release the bending of the belt loop piece 57, and the bending of the belt loop piece 57 is released. As shown in FIGS. 20 and 21, the piston rods 44a of the pair of air cylinders 44 are driven to retreat toward the retracted position, and the pair of gripping portions 47 are retracted, and the pair of gripping portions 47 are retracted. Immediately after passing through the bending position, the belt loop piece 57 is locked by the pair of locking members 51, so that the belt loop piece 57 is removed from the pair of gripping portions 47 and falls down, and The pair of gripping portions 47 recede as they are and return to the retracted position.

As described above, when the presser lowering switch 65c is operated during the interruption of sewing due to the cutting of the upper thread, the upper presser 5 is retracted to the lowering position, and the belt loop piece gripping portion 47 of the folding transfer mechanism 40 is moved. To the retreat position off the side of the bed.
Since the space Ge between the sewing needle 4 of the main needle sewing machine 2 and the belt loop piece supply device 1 is sufficiently ensured, and the upper presser 5 is retracted to the lowered position, the threading to the sewing needle 4 can be easily performed. In addition, the work efficiency of the belt loop single sewing can be increased to increase the productivity.

Further, the folding / transporting mechanism 40 holds the belt loop piece gripping portion 47 to the retracted position where the belt loop piece 57 is fully retracted to the side of the two-needle sewing machine 2 and holds the folded belt loop piece 57 to the bed portion. Since the belt loop piece is moved between the standby position deviating from the sewing position and the sewing position on the upper surface, even when the belt loop piece gripping section 47 is at the standby position, the belt loop piece gripping section 47 does not break even when the thread breaks. It is retracted from the standby position to the retracted position, and a sufficient space Ge between the sewing needle 4 of the two-needle sewing machine 2 and the belt loop piece supply device 1 can be secured.

Further, when the belt loop piece gripping portion 47 is in the retracted position and the press-up switch 65d is operated at the end of the threading operation, when the upper presser 5 returns from the retracted position in which the upper presser 5 is lowered, Since the belt loop piece gripping portion 47 is returned to the original standby position immediately before the interruption of the sewing, the sewing can be restarted at the end of the threading operation, and the operation efficiency of the belt loop piece sewing can be increased to increase the productivity. Can be.

As a modification of the above-described embodiment, when the upper thread break occurs during the execution of sewing in the two-needle sewing machine 2 while the belt loop piece supply control is being executed,
The upper thread break interruption process shown in FIG. 22 may be executed. That is, when the thread breakage signal output from the upper thread breakage detection sensor provided on the two-needle sewing machine 2 is input to the interrupt port of the control unit 60 as an interrupt signal (S30: Yes), the thread breakage signal is output. As the interrupt processing, the interruption save processing is executed (S31). In this interrupted evacuation process, first, the pair of air cylinders 44 is driven to retreat, so that the belt loop piece gripping portion 47 is moved to the evacuation position. Next, by operating the press down switch 65c, the control unit 70 is instructed to lower the upper press, and the upper press 5 is lowered to the lowering and retracting position during sewing.

Then, the threading operation to the sewing needle 4 is performed in a state where a sufficient space Ge is secured, and when the threading is completed, the press-up switch 65d is operated to press the upper press against the control unit 70. Is commanded to rise. Then, S11 and subsequent steps of the belt loop piece supply control are executed.
In this case, when sewing is interrupted due to breakage of the upper thread, when threading the sewing machine through the sewing needle,
The operation for retracting the thread can be omitted, and the operability of the threading operation is improved.

Further, instead of the air cylinder 44, a solenoid actuator capable of precisely controlling the stroke of the output shaft may be applied. In that case, the position detection sensors 42a to 42d can be omitted. Similarly, a solenoid actuator may be applied instead of the other air cylinders 26 and 33, and an electric motor may be applied instead of the air cylinder 45 for rotation. When sewing is interrupted by cutting the upper thread, the press down switch 65
When c is operated, the belt loop piece gripping part 47 is retracted to a predetermined retreat evacuation position where the belt loop piece gripping part 47 does not interfere, such as a bent position off the side of the bed. Is also good.

Further, the above-described embodiment is merely an example, and can be carried out with various changes added to the belt loop piece supply device 1 without departing from the spirit of the present invention. Needless to say, a belt loop supply device for a normal single-needle sewing machine provided with only the upper presser 5 without providing the upper presser 5 may be used.

[0048]

According to the first aspect of the present invention, when the upper presser of the cloth presser is retracted to the retracted position when sewing is interrupted, the belt loop piece gripping portion of the folding means is disengaged to the side of the bed. Since the interruption control means for retracting to the predetermined interruption evacuation position is provided, a sufficient space is provided between the sewing needle of the sewing machine and the belt loop piece supply device, and the upper retainer is retracted to the lowered position. In addition, the threading to the sewing needle can be easily performed, and the work efficiency of the belt loop single sewing can be increased to increase the productivity.

According to the second aspect of the present invention, the bending means holds the belt loop piece gripping portion at the retracted position where the belt loop piece is fully retracted to the side of the sewing machine, and holds the bent belt loop piece to form the bed portion. Since the belt loop is moved between the standby position deviating from the sewing position on the upper surface and the sewing position, even when the belt loop piece gripper is at the standby position, the belt loop piece gripper is moved to the standby position when the thread breaks. To a predetermined retreat position for interruption, and a sufficient space between the sewing needle of the sewing machine and the belt loop piece supply device can be secured. The other effects are the same as those of the first aspect.

According to the third aspect of the present invention, when the belt loop piece gripping part is at the retreat position for interruption and the upper retainer returns upward from the lowering retreat position, the interruption control means is provided with the belt loop piece gripping part. Can be returned to the original position immediately before the interruption of sewing, so at the end of the threading operation, the belt retainer can be returned to the original position just before the interruption of sewing simply by returning the upper presser from the lowering and retracting position to the upper position. Sewing can be restarted quickly, and the efficiency of belt loop single-sewn operation can be increased to increase productivity. The other effects are the same as those of the second aspect.

According to the fourth aspect of the present invention, when the sewing is interrupted due to the breakage of the upper thread, the interruption control means for retracting the belt loop piece gripping portion of the folding means to a predetermined interruption retreat position off the side of the bed. Is provided, when threading the sewing machine through the sewing needle, the operation of retracting the belt loop piece gripping portion can be omitted, and the operability of the threading operation is improved.

[Brief description of the drawings]

FIG. 1 is a front view of a two-needle sewing machine and a belt loop piece supply device according to an embodiment of the present invention.

FIG. 2 is a front view of a two-needle sewing machine and a belt loop piece supply device.

FIG. 3 is a front view of a main part of the belt loop piece supply device.

FIG. 4 is a side view of a main part of the belt loop piece supply device.

FIG. 5 is a perspective view of a main part of the belt loop piece supply device.

FIG. 6 is a block diagram of a control system of the belt loop piece supply device.

FIG. 7 is a schematic flowchart of a belt loop piece supply control routine.

FIG. 8 is a side view of a main part of the belt loop piece supply device in a belt supply state.

FIG. 9 is a side view of a main part of the belt loop piece supply device immediately after the belt is cut.

FIG. 10 is a side view of a main portion of the belt loop piece supply device in a belt loop piece holding state.

FIG. 11 is a side view of a main part of the belt loop piece supply device in a holding state in which a bent belt loop piece is held.

FIG. 12 is a front view of a main part of the belt loop piece supply device in a belt supply state.

FIG. 13 is a front view of a main part of the belt loop piece supply device immediately after the belt is cut.

FIG. 14 is a front view of a main part of the belt loop piece supply device in a belt loop piece holding state.

FIG. 15 is a front view of a main part of the belt loop piece supply device in a state where the belt loop piece is bent.

FIG. 16 is a front view of a main part of the belt loop piece supply device in a state where the belt loop piece is bent.

FIG. 17 is a front view of a main part of the belt loop piece supply device in a state where the presser and the guide are raised.

FIG. 18 is a front view of a main part of the belt loop piece supply device in a state where the holding unit at the standby position has released the bending.

FIG. 19 is a front view of a two-needle sewing machine and a belt loop piece supply device.

FIG. 20 is a front view of a main part of the belt loop piece supply device in a state where the belt loop piece is locked by a locking portion and removed.

FIG. 21 is a front view of a main part of the belt loop piece supply device at a moment when a belt loop piece is removed.

FIG. 22 is a schematic flowchart of a routine of an upper thread break interruption process according to a modified embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt loop piece supply apparatus 2 Two-needle sewing machine 5 Upper presser 10 Material supply mechanism 20 Holding mechanism 40 Bending transfer mechanism 44 Air cylinder 47 Belt loop piece gripping part 57 Belt loop piece 60 Control unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akira Nishio 15-1 Naeshiro-cho, Mizuho-ku, Nagoya City Inside (72) Inventor Takashi Kondo 15-1 Naeshiro-cho, Mizuho-ku, Nagoya City Brother Industries, Ltd. Inside

Claims (4)

[Claims] 1. A belt loop piece supply device for a sewing machine for sewing a belt loop piece around a body, the belt loop piece supply device supplying a belt loop piece having both end portions bent from a side of the sewing machine to a sewing position. Material supply means for supplying and cutting a belt to form a belt loop piece; holding means for holding the belt loop piece supplied by the material supply means; receiving the belt loop piece held by the holding means; Bending means for bending the portion to move to the sewing position; and, when sewing is interrupted, when the upper presser of the cloth pressing means is retracted to the descending retreat position, the belt loop piece gripping portion of the folding means is disengaged to the side of the bed. And a suspension control means for retreating to a predetermined retreat position for suspension, comprising: a belt loop piece supply device for a sewing machine. 2. The folding means according to claim 1, further comprising: a retracting position in which the belt loop piece gripping portion is retracted to the side of the sewing machine at a maximum;
2. The sewing machine according to claim 1, wherein the bent belt loop is held and moved on a top surface of the bed between a standby position deviating from a sewing position and a sewing position.
5. A belt loop piece feeder for a sewing machine according to claim 1. 3. The interruption control means, when the belt loop piece gripping part is at the retreat position for interruption and the upper retainer returns upward from the lowered retreat position, returns the belt loop piece gripping part to the original position immediately before the sewing interruption. 3. The belt loop piece feeding device for a sewing machine according to claim 2, wherein the belt loop piece feeding device is returned to the position. 4. A belt loop piece supply device for a sewing machine for sewing a belt loop piece to a body, wherein the belt loop piece having both ends bent is supplied from a side of the sewing machine to a sewing position. Material supply means for supplying and cutting a belt to form a belt loop piece; holding means for holding the belt loop piece supplied by the material supply means; receiving the belt loop piece held by the holding means; Bending means for bending a portion to move to a sewing position, and interruption control for retracting a belt loop piece gripping portion of the folding means to a predetermined interruption evacuation position off the side of the bed when sewing is interrupted due to breakage of the upper thread. Means for feeding a belt loop piece for a sewing machine.